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题名: Influence of zirconia crystal phase on the catalytic performance of Au/ZrO2 catalysts for low-temperature water gas shift reaction
作者: Li, Juan1;  Chen, Junli1;  Song, Wei1;  Liu, Junlong1;  Shen, Wenjie1
通讯作者: 申文杰
关键词: Au/ZrO2 ;  crystal phase ;  low-temperature ;  water gas shift ;  FTIR
刊名: APPLIED CATALYSIS A-GENERAL
发表日期: 2008
DOI: 10.1016/j.apcata.2007.10.020
卷: 334, 期:1-2, 页:321-329
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 501
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Life Sciences & Biomedicine
类目[WOS]: Chemistry, Physical ;  Environmental Sciences
研究领域[WOS]: Chemistry ;  Environmental Sciences & Ecology
英文摘要: The influence of crystal phase of zirconia on the performance of Au/ZrO2 catalysts for low temperature water gas shift reaction was investigated. Au/ZrO2 catalysts with pure tetragonal and monoclinic phases of ZrO2 were prepared by the deposition-precipitation method with similar gold loading and dispersion. It was found that the Au/m-ZrO2 catalyst showed much higher activity than that of the Au/t-ZrO2 catalyst, which could be attributed to the higher CO adsorption capacity of the Au/m-ZrO2 catalyst. The chemical state of gold that was strongly related to the pretreatment atmosphere also played an essential role in determining the catalytic activity for water gas shift reaction. Hydrogen and/or helium pretreated samples only contained Au-0 species and exhibited higher activity than that of the sample pretreated with oxygen-containing atmosphere which resulted in the co-existence of Au-0 and Au+ species. FTIR study further revealed that the formate species formed by the reaction of the adsorbed CO on gold nanoparticle with the hydroxyl groups on the surface of m-ZrO2 acted as the most important intermediates for the water gas shift reaction. (c) 2007 Elsevier B.V. All rights reserved.
关键词[WOS]: SUPPORTED AU CATALYSTS ;  CO OXIDATION ;  PRETREATMENT CONDITIONS ;  GOLD ;  FTIR ;  HYDROGEN ;  ADSORPTION ;  SITES ;  1,3-BUTADIENE ;  AU/FE2O3
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000252564800038
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/99871
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Li, Juan,Chen, Junli,Song, Wei,et al. Influence of zirconia crystal phase on the catalytic performance of Au/ZrO2 catalysts for low-temperature water gas shift reaction[J]. APPLIED CATALYSIS A-GENERAL,2008,334(1-2):321-329.
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